Ok, so i changed the oil on my car not too long ago. But when I turn on the car, the oil pressure is normal and within a few moments, itll start shooting up and down the whole gauge like some crazy guy on crack. It really bothers me cuz you can hear it hitting the top and bottom of the gauge. I changed the Oil Pressure Sensor hoping it would fix things but it didnt. Is it that i put too much oil or what?
Oil Pressure Going NUTS
- Thread starter MikeROD16
- Start date
Dino Dino Bambino
15 Year Member
It sounds like the oil pressure gauge itself may be faulty. The only way to find out is to hook up a mechanical gauge and see if the oil pressure really does fluctuate. If it does, the problem is a sticking oil pressure relief valve inside the oil pump and the cure is a new pump.
ninety15.0
New Member
- Mar 10, 2004
- 1,336
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well how much oil did you put in? That would answer that question pretty quickly? Did you take 5 quarts out? Did you put 5 quarts in?
I would get a nice mechanical OP gauge on there and see what the deal really is.
I would get a nice mechanical OP gauge on there and see what the deal really is.
Sounds like the bad wiring, grounding out someplace. i would check the wire going to the sensor and replace it. Myabe the plastic/rubber sheath has scraped off someplace and it hitting the block or some type of metal-causing intermittent fluctuating readings.
Later-Good luck, Ant
Later-Good luck, Ant
Dino Dino Bambino
15 Year Member
Unless it's intermittent, grounded out wiring will cause the gauge to stay pegged to the right on high.
When you changed your oil, did you use an engine flush or just a straight change? I know sometimes when you use an engine flush additive before you drain it, the engine flush can dislodge a peice of gasket somewhere in the engine. If that happened it might of gotten caught in the oil pump and or oil pump screen. Its either something like that or a bad gauge, but I would say that its something to do internally with the engine since the problem only began after you changed the oil.
Oil Presure question
So, on my way to work today, I noticed my oil presure was at zero. I have not been paying much attention to it lately, since I did the efan swap, so I have been monitoring my coolant and batt. gauge more than my speedo. As soon as I noticed it, I did not hear or feel anything different with the car. I drove it another 10 miles without any issues, no spike in the coolent temps or anything. Checked the oil with it running, and with it off and seamed ok. I just changed the oil, and I am running 5-30. When I changed it, it was about a quart low, and was very think, I would say at least straight 30W.
Any ideas?
So, on my way to work today, I noticed my oil presure was at zero. I have not been paying much attention to it lately, since I did the efan swap, so I have been monitoring my coolant and batt. gauge more than my speedo. As soon as I noticed it, I did not hear or feel anything different with the car. I drove it another 10 miles without any issues, no spike in the coolent temps or anything. Checked the oil with it running, and with it off and seamed ok. I just changed the oil, and I am running 5-30. When I changed it, it was about a quart low, and was very think, I would say at least straight 30W.
Any ideas?
TenorPlayinGuy
Founding Member
rd
Founding Member
X2 on the gage. This happened on my 79 once. Drove me nuts. Ran fine, did not make death noises. Put a mechanical gage in and it was fine.
Changed the stock gage, and fixed it. A plastic part of the gage had cracked allowing the wire to move and bounce the needle around.
Changed the stock gage, and fixed it. A plastic part of the gage had cracked allowing the wire to move and bounce the needle around.
90_Red_LX
Member
I'd put money on a faulty gauge also. A simple oil change is pretty much impossible to screw up if your 10% mechanically inclined, and would be very unlikely to cause y our issue.
Thanks for the info guys! I didn't hear the death noises like you said. I was thinking of doing a sn95 interior swap in the future and still might, but I was also thinking of getting rid of the stock guages and going completely aftermarket. I really like the equous gauges and may just do the oil and temp like you said...
So, on my way to work today, I noticed my oil presure was at zero. I have not been paying much attention to it lately, since I did the efan swap, so I have been monitoring my coolant and batt. gauge more than my speedo. As soon as I noticed it, I did not hear or feel anything different with the car. I drove it another 10 miles without any issues, no spike in the coolent temps or anything. Checked the oil with it running, and with it off and seamed ok. I just changed the oil, and I am running 5-30. When I changed it, it was about a quart low, and was very think, I would say at least straight 30W.
Any ideas?
alot of times ive noticed that the when the oil pressure spikes its a good sign the oil pump might be going out. but if mine did it and i felt no difference in performance for a little bit, id be like ahh its just another cluster problem. i guess the only way to know with the foxes coolant and oil pressure is to get an aftermarket gauge! that sucks to hear it was the oil pump tho. and good luck with the woman of the house
